One-piece self-locking carton



Jan. 22, 1946 A. c. BEARDSELL 2,393,277

ONE PIECE SELF-LOCKING CARTON I I Filed Nov. e,- 1943 2 S1 1eets-Sheet 1 INVENTOR y A.C.BEA/?DSELL AT TORNEY Jan. 22, 1946. A. c. BEARDSELL 3 3 ONE PIECE SELF-LOCKING CARTON Filed Nov. 6, 1943 2 Sheets-Sheet 2 INVENTORY y ACBEARDSELL ATTORNEY Patented Jan. 22, 1946 ONE-PIECE SELF-LOCKING CARTON Allyn C. Beardsell, Springfield, N. J., assignor to.

Western Electric Company, Incorporated, New York, N. Y., a corporation of New York Application November 6, 1943, Serial No. 509,163 I 7 Claims.

This invention relates to cartons and more particularly to a carton made from a single blank of corrugated paper board-or similar material which may be speedily'assembled by inexperienced operators and whichwhen assembled will provide a shockproof carrier for shipping or storing vacuum tubes, or similar articles.

The primary object of the invention is the production of acarton suitable for packaging frangible vacuum tubes, or similar articles.

Other objects andadvantages will be understood by' referring to the following specification and accompanying drawings wherein Fig. l is a perspectiveview of the container shown with the cover and. tuck flap in a closed position; V

Fig. 2 is a 'plan view on a reduced scale of a blank ready to be folded to produce the container shown in Fig. 1;

Fig.3 is a perspective of a side elevation showterminal portion of the tube and the lead wires. It may be seen that extension I5 also forms an auxiliary bottom wall, extending a little distance beyond the medial line of the carton in accordance with the length of-the tube but abutting the folded end of the other extension. The resilient between extensions I5 andIB and tongue 24.

The container is formed by folding the blank 5 in a forward direction as viewed in Fig. 3. Bottom extensions I5 and I6 are moved in a counterclockwise direction by bringing end sections I4 into their respective rests,- and'liiting slightly on,

tongue 24.

ing the relative working positionsoi the tongue member and the general plan of coherent assemy; and

Fig. 4 is a side elevation view with the end, side and bottom walls in their final positions. I

In the drawings particularly in Fig. 2 there is shown a blank 5' which may be sheared or punched or otherwise cut from corrugated card-' board or other suitable material. The blank shows a plurality of transverse folding lines indicated by broken lines 6 and a plurality of vertical creasing lines indicated by broken lines I which form when folded, cover flap 8, cover portion 9, side wall I0, bottom wall I I, side wall I2, end walls I3 and end wall extensions I4. Cut out I9 iden-i tifles a finger grip portion coacting with theflap 8 of cover portion 9. The ends of flap 8- are sharply cut away near the corners at I! for a frictional insertion at the front corners of the side wall portion I2 and the end walls I3. The end wall portions I3 have-ioldable extensions I4 and articulated extensions l5 and I6 respectively. It will be. noted that I5 has an ofiset section at I8 and an edge recess at 20 and I6 has an. offset section at 2I and a plurality of edge recesses. at 22 and 23 which oflset sections form rests for side wall extensions I4 when the container is in a closed position. I8 has at less than mid point or the bottom wall of the container two transverse score lines 6 so that the upper half of this section may be return folded. As I6 is return folded the lower half 26 will become a supplemental bottom wall II and the folded upper extension 2! becomes a resilient tongue or platform section which is pressed downwardly by theweight oi the The tube which usually has a lead wire attached is inserted by resting the pronged and terminal lead end, on the resilient tongue. Side wall I2 is brought into position after the tube has been inserted. Cover 9 comes into its working position as flap member 8 is tucked downwardly between the edges of the end walls and the front side wall. Pressure exerted by closing the cover depresses the resilient tongue and the tube is held in such a position that the line of stress flowsin an oblique direction upwardly and away from the terminals and toward the end wall.

. While the forming of the container and the packing of the tube has been no more than a single drawing and single folding operation which takes a. minimum or time or skill yet the tube is securely packed. It may be unrolled by merely lifting the cover and the container if desired returned -to its original flat position and used several times over. 4

of said supplemental bottom wall sections, and a self-locking cover integrally disposed from one of the walls of the container.

2. A collapsible solid wall carton formed from a single blank and comprising portions coherently scored to form a bottom, two sides, end walls,'

supplementary side walls, cover and locking flap,

and a plurality of portions articulated from the end walls and forming supports or diflerent thicknesses and resiliency for diflerent portions or the article to be packed, said articuated portions having edge recesses coextensive with each supplemental side wall.

3. A collapsible solid wall carton for vacuum tubes or similar articles formed from a single prising oppositely spaced apart end walls, side' walls, a bottom, cover and locking tab, a first supplemental edged recessed bottom portion extending inwardly a predetermined distance fromone end wall, and a second supplemental edge recessed bottom section return folded a predetermined distance from the other end'wall.

5. A four wall self-locking container for vacuum tubes, comprising a first edge recessed supplemental bottom wall portion integral with an end wall and extending beyond the medial line 01' the main bottom wall, and a second edge recessed supplemental bottom wall portion return folded and abutting the first mentioned supplemental bottom wall member at the fold line.

6. A collapsible carton for vacuum tubes formed from a single blank and comprising flexible units foldable to constitute a bottom, oppositely disposed side and end walls, a cover and a tuck end flap, a plurality of articulated edged recessed supplemental bottom wall portions, a plurality of extensible end wall sections lockingly engaging the recessed edges oi the supplemental wall sections and a platform section resiliently integral with one or the said bottom wall sections and defining an oblique stress take up support for the article to be packed.

7. A' quick fold container for vacuum tubes or similar articles comprising a main unit transv'ersely scored to provide two side walls, two end walls, a bottom, cover, and locking flap a plurality of end wall extensions forming oppositely disposed supplemental side walls, and a plurality of coinciding edge recessed supplemental bottom wall sections hingedly connected to the respective end walls and an edge recessed tongue resiliently integral with one of the bottom wall' sections and angularly disposed therefrom;

ALLYN C. BEARDSELL. 

